The alternate minimums are not aircraft specific. The limitations section, is. You can use an OSAP in an SK 76, or SK 92, but according to the limitations section for the AW 139, you have to have an airport served by an approach other than a GPS. and yes, the GPS is required for the approach.
Very poorly written limitation. Still it's there, black and white. Now do we just ignore it?
"Note" "The pilot must not continue and instrument approach inside the Final Approach Fix (FAF), unless the "APP" advisory is displayed on the PFD." You don't have the "APP" light when executing an OSAP.
Like the folks writing the RWFM never flew a helicopter? Have no idea what an OSAP is???